Dielectric relaxation studies of alkali-metal-doped strontium and barium fluoride

Electrical relaxation in pure and alkali metal thiocyanate complexed poly(ethylene oxide)

“…The absolute temperature is probably accurate only to about O.1K. Other results obtained using this system are given elsewhere (19)(20)(21)(22)(23)(24).…”

Simulations of some simple localised defects in alkali-doped alkaline-earth fluorides

“…Table 7(a) shows the A U,-energies of a fluorine-interstitial-alkali-interstitial pair, [I(F)*I(A)], aligned along a [ 1101 binary axis; this pair is stable and the AUc-values seem to depend rather little on the impurity ion size and on the host crystal. Table 7 (6) shows that, except for the case of Li+, an alkali-interstitial-fluorine-vacancy pair [I(A)*V(F)] aligned along a [ l l l ] trigonal axis is very unstable. This is to be expected, because the defect charges of I(A) and V(F) are the same.…”

“…Table 10 displays the calculated 'reorientation' energies AU, of the [I(A)*S(A)] pair (linear motion, rotation) and [V(F)*S(A)] pair (rotation). The bottom of the table is devoted to the activation energies deduced from analyses [5,6,10,24] of the ITC and DR experiments. Our Li and Na values agree fairly well with those calculated by Jacobs and co-workers [lo], but the heavy (K or Rb) [I(A)*S(A)] pairs-perhaps [V(F)*S(A)] too-are somewhat questionable, because of the probably poor reliability of the SRI.…”